** Shares of China-based financial information co JRJC.O
more than double to $16.75 premarket
** Stock set to hit over a decade high when market opens;
eyes biggest one day pct gain ever
** Co partners with global news and data provider Dow Jones
to gain access to sub-set of its Chinese language newswire
service, which will include market commentary and spot news in
Chinese urn:newsml:reuters.com:*:nPn7fHn3na
** JRJF provides Chinese retail investors access to
securities trading and advisory services, wealth management
products and institutional investors financial database and
analytics
** Up to Tuesday's close, stock had fallen ~18% YTD
(Reporting by C Nivedita)